The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => Frame => Topic started by: Rocket Racer on 28.12. 2015 21:22
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I didnt pay much attention to it but my swing arm has at some point been denuded of any chain guard mounts, likewise the two chain guards I have are not in a great state and were both attached at the bottom shock bolt not to frame lugs, so I'm guessing they might be A65 type *dunno*.
I do have a spare but dented late swing arm to play with if needed, that has the set of lugs.
I will need a chainguard to get the bike through rereg certification and pondering options.
I could have lugs attached to fit either the half or full chain case types (either of which I don't currently have) but that will wreck that paint
or I could continue with simply attaching to the bottom of the shock.
I suspect a painted full chaincase might look out of place against an american market model so thinking a half case probably the go, which presumably still requires the full set of mounts.
Currently a bit torn between fitting an original type guard with the full set of brackets or keeping a cleaner look.
Does anyone with a clean swing arm have a nice option they could post a picture of and ideally know what its off...
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RR, the full chaincase was common on American models, I have one on the Big Valve.
You need the full set of brackets either way with original parts.
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RR, the full chaincase was common on American models, I have one on the Big Valve.
You need the full set of brackets either way with original parts.
Could you please post a pic of a fitted guard, I could be tempted...
I recall draganfly were advertising them.
If I'm going to retrofit the lugs, I'd also like to hide them...
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RR, A picture of each option.
Bear in mind that the half guard should have the front section of the full case bolted to the back of the inner primary case, mostly left off because of difficulties. Looks unsightly without it, though.
With your tank bolt, why not drill and tap the existing adapter?
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Trev,
cheers for those, is that a rubber extension on the front of the half guard.
Of the two I think I prefer the full option, its quite tidy and hides a lot. Looks quite neat.
I guess I'd better price them out.
Tim
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Not a rubber extension, RR, it's the front steel section that I mentioned.
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I might need to study the parts list...
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There's a front section on evil bay at the moment.
http://www.ebay.com.au/itm/BSA-A7-A10-FRONT-CHAIN-GUARD-SECTION-USED-/291648150708?hash=item43e7959cb4:g:inQAAOSw~OdVXrcP
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Not a rubber extension, RR, it's the front steel section that I mentioned.
Couldn't find that referenced in the parts list I have *sad2*
I do have a tatty front section 42-7710 and I recall somewhere the two long bolts that hold that section and the sliding plate behind the clutch...
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Looking at draganflys price list the fully enclosed set up is out of the price range, but I can live with the cost of the half cover type 42-7730.
Just need to figure out what the part number is for that mysterious connecting piece that bolts to the primary chain case *help*
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My 1958 parts list says it's 42-7710.
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My 1958 parts list says it's 42-7710.
I wasn't expecting that. I thought that front piece was just for the full chain guard set.
But if that's the case I do have one somewhere *conf* just need to find it and possibly repair it.
Wouldnt have thought of fitting that with the half guard!
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Sorry, I misunderstood. Thought you were wanting to fit the full, enclosed guard. You're right, that's what it is. I'll look again to see if I can find an extension for the partial guard.
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It is the same piece for either guard.
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that does make sense, i can see why people would leave it off!
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Yeah, RR. It is difficult to get the chain around the sprocket with that enclosure but without it there is an unsightly gap between the chain guard and the inner primary case.
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Wouldn't exactly call it unsightly, but although hidden behind the toolbox the gap is definitely there...
If it really bothers you, shouldn't be to difficult I think to make some kind of extension attached to the primary case to cover the gap?
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thanks guys, either way thats exactly what i needed to know *smile*
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I've got what is probably an a65 partial guard, and it never occurred to me to fit a front section with it! I made the gap minimal on mine and it does not show at all unless you know to look *eek*
Is it possible to fit a chain with the front guard in place should you be unlucky enough to have one break? Even if the answer is yes it must be tricky?
On a style note a super rocket Should have all the go faster lower weight options *smile* a chrome one now would look good.
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If taht is going on an A 65 you must fit it before you put the engine into the frame.
It can not be done after the engine is in which is why most A65's don't have one fitted.
Without it the chain eats the alternator wiring on the over run.
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Here are some pics, I'm not 100% happy with the look of the rear, the guard could be longer or shifted back a bit but then that would have caused problems with a gap at the front etc.
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I thought the fully enclosed chain case was used with the "short" inner primary and the open type used with the "long" inner. Maybe someone knows ?
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Interesting. Don't think I have ever seen a 'long inner' primary before.
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Brian,
The long inner was used with the single sided rear wheel type chainguard and the short with the full width.
The short type are drilled on top for the set screw which goes into the steel front section.
The RGS seems to have had either type but if used, the short one was undrilled on top.
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Interesting. Don't think I have ever seen a 'long inner' primary before.
I had never noticed the difference either... & just seen one on eBay..
http://www.ebay.com.au/itm/BSA-A10-Swing-Arm-Primary-Cover-Set-/231776418262?hash=item35f6f379d6:g:sNoAAOSwwE5WZPDB
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Now I've decided to reinstate the correct mudguard I need to retrofit the lugs so have taken the swingarm back off *eek* what a bugger of a job https://www.youtube.com/watch?v=cbBx4Ql6Umo (https://www.youtube.com/watch?v=cbBx4Ql6Umo); ended up removing the primary but managed to leave the gearbox in, that allowed the swingarm to come forward enough to be turned on its side and removed.
Somewhere I know I have a pair of the long bolts that go through the sliding plate and that front chain cover but where did I put them when we moved house and packed everything up *conf* Didnt think I'd ever need them
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I've also heard the long tube inner primary was used on gold stars, which makes them rare and expensive !
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Just looking at mine even though it is not "correct" I would use the "long" inner primary on the A10 with the open chain guard if I had one. It does fill the gap between the frame and primary nicely and makes it all look a lot tidier.
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I've also heard the long tube inner primary was used on gold stars, which makes them rare and expensive !
dont the primaries for the singles have a different profile tocater for the magneto?
I have a number of twin type inners, long and short.
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Yes, the inners are different for the singles and twins. The singles do have a cut away for the magneto plus they are quite a bit different and the front where they fix to the engines. The outers are interchangeable.
If you have a "long" inner and dont care about "correctness" I would suggest putting it on and seeing what you think, it does fill the gap and make it all look a lot neater.
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Oops yes of course the swing arm singles do not have the same inner *respect*
Now if my bike had the long type inner....the guard could be shifted back and look better so another item on the shopping list *problem*
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do you want me to duck tape one to the parcel I'm sending you?